321316 has 6 divisors (see below), whose sum is σ = 562310. Its totient is φ = 160656.

The previous prime is 321313. The next prime is 321319. The reversal of 321316 is 613123.

321316 = 104² + 105² + ... + 127².

It is an interprime number because it is at equal distance from previous prime (321313) and next prime (321319).

It can be written as a sum of positive squares in only one way, i.e., 306916 + 14400 = 554^2 + 120^2 .

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 321316.

It is not an unprimeable number, because it can be changed into a prime (321311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40161 + ... + 40168.

2³²¹³¹⁶ is an apocalyptic number.

It is an amenable number.

321316 is a deficient number, since it is larger than the sum of its proper divisors (240994).

321316 is a wasteful number, since it uses less digits than its factorization.

321316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80333 (or 80331 counting only the distinct ones).

The product of its digits is 108, while the sum is 16.

The square root of 321316 is about 566.8474221517. The cubic root of 321316 is about 68.4926733066.

Adding to 321316 its reverse (613123), we get a palindrome (934439).

The spelling of 321316 in words is "three hundred twenty-one thousand, three hundred sixteen".